Valve



' W. H. WASHBURNE.

VALVE.

APPLICATION FILED MAY I4, I919.

Patented May 4, 1920.

are same SEATING VALVE WILLIAM H.

WASI-IBURNE, OF CHICAGO, ILLINOIS, ASSIGNOR COMPANY, OF CHICAGO, ILLINOIS, A

GFFIQE.

CORPORATION OF ILLINOIS.

VALVE.

Application filed May '14,

T 0 all whom it may concern:

Be it known that 1, WILLIAM H. VVASH-' BURNE, a citizen of the United States, residing at Chicago, county of Cook, State of Illinois, have-invented a certain new and useful Improvement in Valves, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanyingdrawings, which form a part of this specification.

My invention relates particularly to frusto conical valves of the laminated type and has for its object to improve the construction of the same.

The purpose in makin valves laminated is to cushion them against blows, make them seat tightly, regardless of slight irregularities in the contacting surfaces, and produce more or less of a scraping action between the contacting surfaces tending to keep them clean. In attempting to secure these qualities in valves there has always been, so far as I am aware, too much flexibility or the wrong kind of flexibility, thereby defeating the intended purpose through a spreading or separation of the laminae at the edges and permitting the entrance oi flame, hot gases, and solid forcign matter.

Specifically considered, the present invention has for its object to produce a laminated trusto-conical valve which shall possess the requisite flexibility to give to it the desired cushioning, seating and cleaning capacity, without being of 'such a construction that the laminae will spread apart at the edges so as to admit the entry of solid foreign matter or of hot gases which will act to draw the temper.

The various features of novelty whereby my. invention is characterized will hereinafter be pointed out with particularity in the claim; but, for a full understanding of my invention and of its objects and advantages, reference may be had to the following detailed description taken in connection with the accompanying drawing, wherein:

Figure 1 is a side elevation of a valve arranged in accordance with the preferred form of my invention, the member having the cooperating valve seat being shown in section; and

Fig. 2 is a view similar to Fig. l, illusfrusto-conical Specification of Letters Patent.

bon or of flame which quickly Patented Ma a, 1920.

1919. Serial No. 297,063.

trating a modification, a portion of the valve in Fig. 2 being in section.

Referring to Fig. 1 of the drawing, 1 represents a valve stem from one end a shoulder, 9., directed toward that end. On the shoulder rests a plate, 3, in the form of a washer which is thick at the center and at the margin tapers gradually to a thickness approximating that of the individual laminae, l, of which the body of the valve is composed. The laminaeare in the form of thin washer-like disks of extra hard steel lying upon the member 3 and clamped tightly down upon the same by means of a top plate, 5, larger than the plate 3 but similar thereto in that. it is made thick at the center and at the margin tapers gradually to a thickness corresponding approximately to that of the individual laminae. The plate is held in'place by K362111801? a suitable part, 6, on the end of the valve stem; this part taking any usual or suitable form, preferably being simply a head formed by riveting the end of the stem, since valve is such that there is no necessity l'or taking it apart after it has once been'assembled. The face of the valve is finished so that it takes the form of a trustum of a cone the extreme circular elements at the ends of which. are the edges of the clamping plates. lVhen the valve is fitted to its seat, indicated at 7, not only the laminate but also the edges of the clamping plates engage with the seat.

.lt will thus be seen that the valve has a slight marginal flexibility very similar to that which would he possessed by solid body of flexible material. his results from.

the expansion of the clamping plates into the actual valve face and thcgradual tapering of the marginal portions oi the clamping plates so as to avoid anabrupt transition from a point oi substantially complete rigidity to one ol complete flexibility along any radius. The valve will therefore yield sutficiently to secure the desired results without leaving any possibility of a fan-like spreading of the laminae, to a greater or lesser degree, which will permit the entrance oi cardraws the temper of the laminae in valves where such spreading takes place.

In the arrangement shown in Fig. 2 the arts are the same as those hereto. ore described except that the stem, 8, has a shoulhaving a short distance.

der, 9, which is formed simply by reducing the diameter of the end of the stem, and the plate, 10, Which corresponds to the plate 3 is provided with a skirt or flange, 11, closely fitting the stem below the shoulder.

While I have illustrated and described only a single preferred form of my invention with a single slight modification, I do not desire to be limited to the exact structural details thus illustrated and described;

but intend to cover all forms and arrange- I claim): I A frusto-conicel valve comprlsing a body of thin flexible disks lyingnpon each other;

stiff end plates one lying above and the other below said disks,,and means for Jclarnpi'ng said end plates and disks together, eacli of said plates being of appro-Xhnetely the sam WILLIAM H. WASHBURNE. 

